* {
    margin: 0;
    padding: 0;
}

#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    min-width: 1000px;
    z-index: -100;
    zoom: 1;
    background: grey url("../IMG/lilium-my-bilginyacht.jpeg") no-repeat;
    background-size: cover;
}
a {
    text-decoration: none;
    color: aliceblue;
}
#mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    zoom: 1;
    background-color: rgba(0, 0, 0, .4);
    background-size: cover;
}
h1 {
    margin-top: 32%;
    text-align: center;
    font-size: 76px;
    font-weight: normal;
    color: white;
}
#strong {
    font-weight: normal;
}
h2 {
    font-size: 28px;
    text-align: center;
    font-weight: lighter;
    margin-top: 1%;
    color: white;
}
.entre {
    background-color: rgba(0, 0, 0, 0.5);
    width: 130px;
    height: 50px;
    text-align: center;
    font-size: 30px;
    border-radius: 10px;
    position: absolute;
    color: aliceblue;
    top: 80%;
    left: 46%;
}